Malicious PDF — malware analysis report

Static analysis result for SHA-256 74fef4475a70afaf…

MALICIOUS

PDF

68.7 KB Created: 2020-11-13 23:43:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: ab111178a2da9f9bbd4301b52dbeb6cb SHA-1: b0f6f07404204f90e971b9d5cf8d3f9d70111470 SHA-256: 74fef4475a70afaf6204da90c2b7950767134350ab005b1432eb8f2a8ec982b3
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. ClamAV detection and ML classification strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to a 'study guide'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://trafffe.ru/123?utm_term=texes+life+science+7-12+study+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387428/normal_5faaedf0814b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387811/normal_5f94bb610a6d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464530/normal_5fa85828e5c83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374366/normal_5f9269cba27f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375353/normal_5faae5fd7069e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366980/normal_5f87664bbadc7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366358/normal_5f9a3df87a49d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417995/normal_5faab5da5d783.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463275/normal_5fab32a5ca71d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414848/normal_5f9af82019a43.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445731/normal_5f9fcfb8944f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385862/normal_5f9264d24e204.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ce95161-6e9c-476b-af33-aa92b40f9730/blank_february_2020_calendar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cef37ed-95da-4060-a1c1-725ef376aef5/81575748619.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff180e1a-02d6-432a-aa5f-94c45c4492d6/rasadawazo.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0BC 5300 bytes
SHA-256: a1293066d6979e1106369add6556ce41aac21615c86a035185fe2b22bdb73ec3
font_01_sfnt_off0000e306.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE306 10140 bytes
SHA-256: 40fbf36dcc08e9496f84255a2c4b73e17d578b25e03f89d4e82a3d2725270004